import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home',
      component: Home,
      redirect: '/welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users }
      ]
    }
  ]
})
// 为路由对象,添加 beforeEach 导航守卫
router.beforeEach((to, from, next) => {
  // 如果用户访问的是登录页,直接放行
  if (to.path === '/login') return next()
  // 从sessionStorage 中获取到 保存的token值
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有token,强制跳转到登录页
  if (!tokenStr) return next('/login')
  next()
})
export default router
